MM1 MAZEDATA Format

MM1 MAZEDATA Format

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Might and Magic I stores maze geometry in MAZEDATA.DTA: 55 screens × 512 bytes = 28 160 bytes. Layout matches MM2 map.dat (see map.dat format):

Offset	Size	Page
0x000	256	Visual — four 2-bit wall fields per cell (N/E/S/W): 0 open, 1 wall, 2 torch, 3 door
0x100	256	Collision — `(dark<<1)

Overland sectors (areaa1…areae4) still use MapWalls page-0 encoding in the original game (not MM2 terrain ids). For the HTML walker, see MM1 → MM2 outdoor conversion.

Screen index ↔ name

MM.EXE holds a null-terminated slug table at file offset 0x10C07, in MAZEDATA order (55 entries): sorpigal, portsmit, algary, … astral. Each slug matches a companion *.OVR map script file (events), not embedded in the DTA.

Display titles and loaders: tools/mm1_maps.py, tools/export_mm1_map_walker.py.

Walker

Indoor HTML walker: wiki/mm1-maze-walker/. Regenerate with python tools/export_mm1_map_walker.py (GOG MAZEDATA.DTA, MM2 map.dat/attrib.dat for overland, lagdotcom re/lagdotcom/exported/wall*.png for dungeon walls).